Means for removing free carbon from coal-tar.



C. B. LOWRY & R. BERNHARD.

SECURITY TRUST COMPANY, ADMINIsTnATbR or 0; B. LOWRY, DBOD. MEANS FOR REMOVING FREE GARBON FROM GOAL TAR.

APPLICATION FILED MAY 26. 190B.

95 1,993. Patented Mar. 15, 1910. 2 sHnnTs-sn'nn'r 1. Fig.1.

Wane/age:

(ilk/0602255. L 014 019 G. B. LOWRY & R. BERNHARD. SECURITY TRUST COMPANY, ADMINISTRATOR or 0. B. LOWRY, DEOD.

MEANS FOR REMOVING FREE. CARBON FROM GOAL TAR.

APPLIQATION FILED MAY 26; 1908.

Patented Mar. 15, 1910.

2 SHEETS-SHEET 2.

flair/Z6611 B. L0 @511 l /lard Removing Free the filtering chamber and is equipped with a l free-carbon, at the outside of the chamber. For this purpose we have UNITED sT'AtrEs PATENT OFFICE.

CUTHBEBT B. LOWRY, or LEXINGTON, KENTUCKY, AND RICHARD BEaNHAnn, or CUDAHY, WISCONSIN; SECURITY TRUST COMPANY, ADMINISTBATOR- or SAID LOWRY DECEASED, ASSIGNOR TO STOUGHTON A. FLETCHER,.TRUSTEE, INDIAN- APOLIS, INDIANA.

MEANS roIt nEMovINe FREE cannon FROM COAL-TAR.

Patented. Mar. 15, 1911 Serial No. 435,061.

Specification of Letters Patent. Application filed may as, 1908.

lb all whom 'it may concern: and may be readily adjusted to s nthe Be it known that we, CUTHBERT B. LowRY, disks. In the event of any opening not beof-Lex1ngton, in the county of Fayette, mgused, it may be closed by a plug 8, shown State of Kentucky, and RICHARD BERNHARD, at the right of Fig. 1. As-shown in Fig. 4

the disks 6 may be inserted in the openings from the inside of the filter and their edges being beveled the pressure within the vessel will tend to force them more firmly against their seats, the spiders then serving to pre vent the disks from breaking or being forced of Cudahy, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Means for Carbon from Coal-Tar; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use'the same.

The object of this invention is to provide simple and hi hly efficient means for separating free-car 'on'from coal-tar, specifically, to carry out the process embraced by applivessel. This trough collects the coal-tar,decation for patent filed February 27, 1908, prived of free-carbon, on the exterior of the Serial No. 418,073. I vessel, and such tar is conveyed away through The invention will be hereinafter fully set a. pipe or pipes 12. forth and particularly'pointed out in the To effect the filtration of the coal-tar'the claims. latter must be heated to approximately 250 In the accompanying drawings, Figure 1 is a vertical; longitudinal sectional view. Fig, 2 is a top view with parts broken away, and others in dotted lines. Fig. 3 is an enlarged sectional view. Fig. 4 shows a slight modification.

Referring to vessel, preferably out.

p In the top of the vessel is a large manhole normally closed by a door 9. Surrounding the vessel at a point beneath the lowest row of openings, is a circumferential trough 10,

sistency ofthe coal-tar and theresistance of the filtering medium. The'coal-ta-r may be but it is preferable, for many reasons, have all the parts consolidated in one structures Hence within the imperforate, portion of the vessel we locate two heater coils the drawings, 1 designates a cylindrical, and 2 a bottom plate, these parts beingunited by bolts 3. The lower portion of the vessel is practically imperforate, save for an opening 4: for the sludge outlet which'opening is controlled by a cock 5. In practice we employ heating chamber,that is, several outlets and control each by a separate ed by a casing 15 of thin cock. 1 bottom a flange 16- which is held against a The upper part gasket 17 by the bottom edge of the filtering vessel. The object of I is to prevent any of thefree-carbon, after being filtered from the coal-tar, from contacting with the heating coils upon which it would bake and hence impair their efficiency? The se' aration of the free-carbon fromthe coal-tar 1S effected by filtration tlirough '-the wooden disks. 'While all the stable and-preservative properties of the tar are permitted to filter through the disks, the free-carbon by heavy flanges capped both inside and out to enable steam connections to be readily made. These coils are located w1th1n a of the vessel constitutes medium through be collected, devoid of passso that it may Y shown the latter formed with several circumferential rows of spaced-apart openings, each opening being closed by a wooden disk 6, preferably beveled on its periphery and retained by a spider 7 bearing against a' flange thereof. The disks may be formed ofcotton Wood or soft of use as a wood preservayellow poplar, or other comparatlvely state, incapable wood, but preferably one of soft fiber. The two) 1's separated from the other constitwood is out at right angles. to the grain. uents. While we prefer'to use wood as the filtering medium, yet we do not confine 'our- The spiders are screwed into the openings which is shown as being integral with the F., the temperature depending-upon the con-,-

heated before it is introduced into the filter, I

13 and 14, which are connected to bottom 2' they are surroundmetal having at its this internal chamber (which alone'renders coal-tar, in its normal I carried by and apphcation of a wrench or other suitable too result being that the scraper applicable to each row of disks will remove the carbon deposits from the inner faces thereof, whereon it collects in the form of thick scum or heavy solution. I hen the scrapers are actuated this substance will accumulate in the settling chamber surrounding the heating scraper inserted through chamber where there is no agitation. The heavy residue maybe wlthdrawn interm1t-. tently through cock 5.

If any of the freeand solidify in the setmay be removed by a the top manhole, and if need be the vessel as a whole may be readily removed from the bottom plate Without disturbing any of the steam pine connections. If it be necessary, access may then be had to the coils by merely removing the heating chamber casing.

In practice. coal-tar is supplied through carbon should bak tling chamber, it

pipe 21, leading from a force-pump '(not shown.) The coal-tar is admitted into the coils, pansion consequent upon the heating is in some instances sutficient to insure the percolation of the coal-tar through the wooden disks, yet we preferably place the coal-tar under pump pressure. ter through the several disks, but the freecarbon will be arrested at the surfaces thereof. V The former will fall into the surrounding trough 10, while the carbon after being heated steam scraped from the disks Will accumulate in the settling chamber Without dann'er of baking on the heating coils.

1 WVe claim as our invention 1. Means for separating free-carbon from coal-tar comprising a closed vessel having an outlet opening in "theupper ort-ion of the wallthereof, a filtering me ium composed of a block of soft wood located over I ,snch outlet opening, means within the lower portion of the vessel for heatin coal-tar, and a receptacle'on the outside 0 the vessel beneath said opening for receiving the coaltar after it is eprived of the free-carbon. 2. Means forseparatlng free-carbon from coal-tar compris ng a closed vessel having an outlet opemlig in the upper portion of the shaftnnay be readily rotated, the.

the upper portion of wood fitted' in preventing the outward movements of such and while the ex-v The coal-tar will fil-.

the side thereof, a filtering medium composed of a block of soft wood located over such outlet opening, means within the lower portion of such vessel for heating coal-tar,

. revoluble means within the upper portion of the vessel for removing free-carbon from the surface of such block, and a receptacle on the exterior of said vessel beneath said opening for receiving the coal-tar after it is deprlved of the free-carbon.

3. Means for separating free-carbon from coal-tar comprising a closed vessel having a circularly arranged row of openings in of the side thereof, disks such openings, spiders for disks, a revoluble scraper within the vessel for engaging the inner faces of such disks, and means in the lower portion of the vessel for heating coal-tar.

4. Means forseparating free-carbon from coal-tar comprising a closed vessel having openings formed in the upper portion of the slde wall thereof, disks of wood fitted in said openings, means in the lower portion of the vessel for heating coal-tar, and a circularly-arranged trough on the exterior of the vessel beneath said openings.

5. Means for separating free-carbon from coal-tar comprising a closed vessel having its lower part imperforate and its upper part formed with a series of circularly-arran ed openings, disks of wood .fitted in said openings, a trough surrounding said vessel beneath said openings, heater coils within the vessel, a centrally-arranged shaft and a scraper carried thereby for scraping the inner faces of said disks.

6. Means for separating free-carbon from coal-tar comprising a vessel having a lower imperforate portion and an upper filtering portion, a bottom, heating coils mounted on gain bottom, h b 1 ormin a heatin 0 am er, a su y pi e opening through said bottom said heating chamber, and means for detachably securing the lower ends of said casing and vessel to said bottom.

In testimonywhereof, we have signed this specification in the presence of subscrlbmg witnesses.

' CUTHBERT B. LOWRY. RICHARD BERNHARD. Witnesses to signature of C. B. Lowry:

S. SLYANTIS, J. C.. SHELBY. Witnesses to signature of Richard Bernhard: Y

D. M. HOUSTON,

F. G. BECKER.

a casing surrounding said coils- 

